Homocoupling and Reduction of the Organyl Halide

As mentioned in Section 8.2, organopalladium(II) complexes can react with organyl halides to yield products of cross-coupling. The formation of large amounts of symmetric biaryls as a result of homocoupling of the aryl halide is often observed during 

3 eq methyl acrylate 4 eq NEt3, 80 °C, 24 h catalyst, solvent ( YY -V -C02Me,  

3% Pd(PPh3)2CI2, DMSO 3% Pd(PPh3)2CI2, C6H6 0% no reaction 56% 

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